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mageiaGentoo FoundationMGASA-2020-0195
HistoryMay 05, 2020 - 3:20 p.m.

Updated openvpn packages fix security vulnerability

2020-05-0515:20:37
Gentoo Foundation
advisories.mageia.org
22
openvpn
data channel v2
security vulnerability
update
ncp

CVSS2

4.3

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:M/Au:N/C:N/I:N/A:P

CVSS3

3.7

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

LOW

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

EPSS

0.005

Percentile

76.8%

Updated openvpn packages fix security vulnerability: An issue was discovered in OpenVPN 2.4.x before 2.4.9. An attacker can inject a data channel v2 (P_DATA_V2) packet using a victim’s peer-id. Normally such packets are dropped, but if this packet arrives before the data channel crypto parameters have been initialized, the victim’s connection will be dropped. This requires careful timing due to the small time window (usually within a few seconds) between the victim client connection starting and the server PUSH_REPLY response back to the client. This attack will only work if Negotiable Cipher Parameters (NCP) is in use (CVE-2020-11810). The openvpn package has been updated to version 2.4.9, fixing the issue and other bugs. See the upstream release notes for details.

OSVersionArchitecturePackageVersionFilename
Mageia7noarchopenvpn< 2.4.9-1openvpn-2.4.9-1.mga7

CVSS2

4.3

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:M/Au:N/C:N/I:N/A:P

CVSS3

3.7

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

LOW

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

EPSS

0.005

Percentile

76.8%